/*

* Handle git attributes. See gitattributes(5) for a description of

* the file syntax, and attr.h for a description of the API.

*

* One basic design decision here is that we are not going to support

* an insanely large number of attributes.

*/

#include "cache.h"

#include "config.h"

#include "exec-cmd.h"

#include "attr.h"

#include "dir.h"

#include "utf8.h"

#include "quote.h"

#include "thread-utils.h"

const char git_attr__true[] = "(builtin)true";

const char git_attr__false[] = "\0(builtin)false";

static const char git_attr__unknown[] = "(builtin)unknown";

#define ATTR__TRUE git_attr__true

#define ATTR__FALSE git_attr__false

#define ATTR__UNSET NULL

#define ATTR__UNKNOWN git_attr__unknown

#ifndef DEBUG_ATTR

#define DEBUG_ATTR 0

#endif

struct git_attr {

int attr_nr; /* unique attribute number */

char name[FLEX_ARRAY]; /* attribute name */

};

const char *git_attr_name(const struct git_attr *attr)

{

return attr->name;

}

struct attr_hashmap {

struct hashmap map;

pthread_mutex_t mutex;

};

static inline void hashmap_lock(struct attr_hashmap *map)

{

pthread_mutex_lock(&map->mutex);

}

static inline void hashmap_unlock(struct attr_hashmap *map)

{

pthread_mutex_unlock(&map->mutex);

}

/*

* The global dictionary of all interned attributes. This

* is a singleton object which is shared between threads.

* Access to this dictionary must be surrounded with a mutex.

*/

static struct attr_hashmap g_attr_hashmap;

/* The container for objects stored in "struct attr_hashmap" */

struct attr_hash_entry {

struct hashmap_entry ent;

const char *key; /* the key; memory should be owned by value */

size_t keylen; /* length of the key */

void *value; /* the stored value */

};

/* attr_hashmap comparison function */

static int attr_hash_entry_cmp(const void *unused_cmp_data,

const struct hashmap_entry *eptr,

const struct hashmap_entry *entry_or_key,

const void *unused_keydata)

{

const struct attr_hash_entry *a, *b;

a = container_of(eptr, const struct attr_hash_entry, ent);

b = container_of(entry_or_key, const struct attr_hash_entry, ent);

return (a->keylen != b->keylen) || strncmp(a->key, b->key, a->keylen);

}

/* Initialize an 'attr_hashmap' object */

static void attr_hashmap_init(struct attr_hashmap *map)

{

hashmap_init(&map->map, attr_hash_entry_cmp, NULL, 0);

}

/*

* Retrieve the 'value' stored in a hashmap given the provided 'key'.

* If there is no matching entry, return NULL.

*/

static void *attr_hashmap_get(struct attr_hashmap *map,

const char *key, size_t keylen)

{

struct attr_hash_entry k;

struct attr_hash_entry *e;

if (!map->map.tablesize)

attr_hashmap_init(map);

hashmap_entry_init(&k.ent, memhash(key, keylen));

k.key = key;

k.keylen = keylen;

e = hashmap_get_entry(&map->map, &k, ent, NULL);

return e ? e->value : NULL;

}

/* Add 'value' to a hashmap based on the provided 'key'. */

static void attr_hashmap_add(struct attr_hashmap *map,

const char *key, size_t keylen,

void *value)

{

struct attr_hash_entry *e;

if (!map->map.tablesize)

attr_hashmap_init(map);

e = xmalloc(sizeof(struct attr_hash_entry));

hashmap_entry_init(&e->ent, memhash(key, keylen));

e->key = key;

e->keylen = keylen;

e->value = value;

hashmap_add(&map->map, &e->ent);

}

struct all_attrs_item {

const struct git_attr *attr;

const char *value;

/*

* If 'macro' is non-NULL, indicates that 'attr' is a macro based on

* the current attribute stack and contains a pointer to the match_attr

* definition of the macro

*/

const struct match_attr *macro;

};

/*

* Reallocate and reinitialize the array of all attributes (which is used in

* the attribute collection process) in 'check' based on the global dictionary

* of attributes.

*/

static void all_attrs_init(struct attr_hashmap *map, struct attr_check *check)

{

int i;

unsigned int size;

hashmap_lock(map);

size = hashmap_get_size(&map->map);

if (size < check->all_attrs_nr)

BUG("interned attributes shouldn't be deleted");

/*

* If the number of attributes in the global dictionary has increased

* (or this attr_check instance doesn't have an initialized all_attrs

* field), reallocate the provided attr_check instance's all_attrs

* field and fill each entry with its corresponding git_attr.

*/

if (size != check->all_attrs_nr) {

struct attr_hash_entry *e;

struct hashmap_iter iter;

REALLOC_ARRAY(check->all_attrs, size);

check->all_attrs_nr = size;

hashmap_for_each_entry(&map->map, &iter, e,

ent /* member name */) {

const struct git_attr *a = e->value;

check->all_attrs[a->attr_nr].attr = a;

}

}

hashmap_unlock(map);

/*

* Re-initialize every entry in check->all_attrs.

* This re-initialization can live outside of the locked region since

* the attribute dictionary is no longer being accessed.

*/

for (i = 0; i < check->all_attrs_nr; i++) {

check->all_attrs[i].value = ATTR__UNKNOWN;

check->all_attrs[i].macro = NULL;

}

}

static int attr_name_valid(const char *name, size_t namelen)

{

/*

* Attribute name cannot begin with '-' and must consist of

* characters from [-A-Za-z0-9_.].

*/

if (namelen <= 0 || *name == '-')

return 0;

while (namelen--) {

char ch = *name++;

if (! (ch == '-' || ch == '.' || ch == '_' ||

('0' <= ch && ch <= '9') ||

('a' <= ch && ch <= 'z') ||

('A' <= ch && ch <= 'Z')) )

return 0;

}

return 1;

}

static void report_invalid_attr(const char *name, size_t len,

const char *src, int lineno)

{

struct strbuf err = STRBUF_INIT;

strbuf_addf(&err, _("%.*s is not a valid attribute name"),

(int) len, name);

fprintf(stderr, "%s: %s:%d\n", err.buf, src, lineno);

strbuf_release(&err);

}

/*

* Given a 'name', lookup and return the corresponding attribute in the global

* dictionary. If no entry is found, create a new attribute and store it in

* the dictionary.

*/

static const struct git_attr *git_attr_internal(const char *name, int namelen)

{

struct git_attr *a;

if (!attr_name_valid(name, namelen))

return NULL;

hashmap_lock(&g_attr_hashmap);

a = attr_hashmap_get(&g_attr_hashmap, name, namelen);

if (!a) {

FLEX_ALLOC_MEM(a, name, name, namelen);

a->attr_nr = hashmap_get_size(&g_attr_hashmap.map);

attr_hashmap_add(&g_attr_hashmap, a->name, namelen, a);

assert(a->attr_nr ==

(hashmap_get_size(&g_attr_hashmap.map) - 1));

}

hashmap_unlock(&g_attr_hashmap);

return a;

}

const struct git_attr *git_attr(const char *name)

{

return git_attr_internal(name, strlen(name));

}

/* What does a matched pattern decide? */

struct attr_state {

const struct git_attr *attr;

const char *setto;

};

struct pattern {

const char *pattern;

int patternlen;

int nowildcardlen;

unsigned flags; /* PATTERN_FLAG_* */

};

/*

* One rule, as from a .gitattributes file.

*

* If is_macro is true, then u.attr is a pointer to the git_attr being

* defined.

*

* If is_macro is false, then u.pat is the filename pattern to which the

* rule applies.

*

* In either case, num_attr is the number of attributes affected by

* this rule, and state is an array listing them. The attributes are

* listed as they appear in the file (macros unexpanded).

*/

struct match_attr {

union {

struct pattern pat;

const struct git_attr *attr;

} u;

char is_macro;

unsigned num_attr;

struct attr_state state[FLEX_ARRAY];

};

static const char blank[] = " \t\r\n";

/*

* Parse a whitespace-delimited attribute state (i.e., "attr",

* "-attr", "!attr", or "attr=value") from the string starting at src.

* If e is not NULL, write the results to *e. Return a pointer to the

* remainder of the string (with leading whitespace removed), or NULL

* if there was an error.

*/

static const char *parse_attr(const char *src, int lineno, const char *cp,

struct attr_state *e)

{

const char *ep, *equals;

int len;

ep = cp + strcspn(cp, blank);

equals = strchr(cp, '=');

if (equals && ep < equals)

equals = NULL;

if (equals)

len = equals - cp;

else

len = ep - cp;

if (!e) {

if (*cp == '-' || *cp == '!') {

cp++;

len--;

}

if (!attr_name_valid(cp, len)) {

report_invalid_attr(cp, len, src, lineno);

return NULL;

}

} else {

/*

* As this function is always called twice, once with

* e == NULL in the first pass and then e != NULL in

* the second pass, no need for attr_name_valid()

* check here.

*/

if (*cp == '-' || *cp == '!') {

e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET;

cp++;

len--;

}

else if (!equals)

e->setto = ATTR__TRUE;

else {

e->setto = xmemdupz(equals + 1, ep - equals - 1);

}

e->attr = git_attr_internal(cp, len);

}

return ep + strspn(ep, blank);

}

static struct match_attr *parse_attr_line(const char *line, const char *src,

int lineno, int macro_ok)

{

int namelen;

int num_attr, i;

const char *cp, *name, *states;

struct match_attr *res = NULL;

int is_macro;

struct strbuf pattern = STRBUF_INIT;

cp = line + strspn(line, blank);

if (!*cp || *cp == '#')

return NULL;

name = cp;

if (*cp == '"' && !unquote_c_style(&pattern, name, &states)) {

name = pattern.buf;

namelen = pattern.len;

} else {

namelen = strcspn(name, blank);

states = name + namelen;

}

if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen &&

starts_with(name, ATTRIBUTE_MACRO_PREFIX)) {

if (!macro_ok) {

fprintf_ln(stderr, _("%s not allowed: %s:%d"),

name, src, lineno);

goto fail_return;

}

is_macro = 1;

name += strlen(ATTRIBUTE_MACRO_PREFIX);

name += strspn(name, blank);

namelen = strcspn(name, blank);

if (!attr_name_valid(name, namelen)) {

report_invalid_attr(name, namelen, src, lineno);

goto fail_return;

}

}

else

is_macro = 0;

states += strspn(states, blank);

/* First pass to count the attr_states */

for (cp = states, num_attr = 0; *cp; num_attr++) {

cp = parse_attr(src, lineno, cp, NULL);

if (!cp)

goto fail_return;

}

res = xcalloc(1,

sizeof(*res) +

sizeof(struct attr_state) * num_attr +

(is_macro ? 0 : namelen + 1));

if (is_macro) {

res->u.attr = git_attr_internal(name, namelen);

} else {

char *p = (char *)&(res->state[num_attr]);

memcpy(p, name, namelen);

res->u.pat.pattern = p;

parse_path_pattern(&res->u.pat.pattern,

&res->u.pat.patternlen,

&res->u.pat.flags,

&res->u.pat.nowildcardlen);

if (res->u.pat.flags & PATTERN_FLAG_NEGATIVE) {

warning(_("Negative patterns are ignored in git attributes\n"

"Use '\\!' for literal leading exclamation."));

goto fail_return;

}

}

res->is_macro = is_macro;

res->num_attr = num_attr;

/* Second pass to fill the attr_states */

for (cp = states, i = 0; *cp; i++) {

cp = parse_attr(src, lineno, cp, &(res->state[i]));

}

strbuf_release(&pattern);

return res;

fail_return:

strbuf_release(&pattern);

free(res);

return NULL;

}

/*

* Like info/exclude and .gitignore, the attribute information can

* come from many places.

*

* (1) .gitattributes file of the same directory;

* (2) .gitattributes file of the parent directory if (1) does not have

* any match; this goes recursively upwards, just like .gitignore.

* (3) $GIT_DIR/info/attributes, which overrides both of the above.

*

* In the same file, later entries override the earlier match, so in the

* global list, we would have entries from info/attributes the earliest

* (reading the file from top to bottom), .gitattributes of the root

* directory (again, reading the file from top to bottom) down to the

* current directory, and then scan the list backwards to find the first match.

* This is exactly the same as what is_excluded() does in dir.c to deal with

* .gitignore file and info/excludes file as a fallback.

*/

struct attr_stack {

struct attr_stack *prev;

char *origin;

size_t originlen;

unsigned num_matches;

unsigned alloc;

struct match_attr **attrs;

};

static void attr_stack_free(struct attr_stack *e)

{

int i;

free(e->origin);

for (i = 0; i < e->num_matches; i++) {

struct match_attr *a = e->attrs[i];

int j;

for (j = 0; j < a->num_attr; j++) {

const char *setto = a->state[j].setto;

if (setto == ATTR__TRUE ||

setto == ATTR__FALSE ||

setto == ATTR__UNSET ||

setto == ATTR__UNKNOWN)

;

else

free((char *) setto);

}

free(a);

}

free(e->attrs);

free(e);

}

static void drop_attr_stack(struct attr_stack **stack)

{

while (*stack) {

struct attr_stack *elem = *stack;

*stack = elem->prev;

attr_stack_free(elem);

}

}

/* List of all attr_check structs; access should be surrounded by mutex */

static struct check_vector {

size_t nr;

size_t alloc;

struct attr_check **checks;

pthread_mutex_t mutex;

} check_vector;

static inline void vector_lock(void)

{

pthread_mutex_lock(&check_vector.mutex);

}

static inline void vector_unlock(void)

{

pthread_mutex_unlock(&check_vector.mutex);

}

static void check_vector_add(struct attr_check *c)

{

vector_lock();

ALLOC_GROW(check_vector.checks,

check_vector.nr + 1,

check_vector.alloc);

check_vector.checks[check_vector.nr++] = c;

vector_unlock();

}

static void check_vector_remove(struct attr_check *check)

{

int i;

vector_lock();

/* Find entry */

for (i = 0; i < check_vector.nr; i++)

if (check_vector.checks[i] == check)

break;

if (i >= check_vector.nr)

BUG("no entry found");

/* shift entries over */

for (; i < check_vector.nr - 1; i++)

check_vector.checks[i] = check_vector.checks[i + 1];

check_vector.nr--;

vector_unlock();

}

/* Iterate through all attr_check instances and drop their stacks */

static void drop_all_attr_stacks(void)

{

int i;

vector_lock();

for (i = 0; i < check_vector.nr; i++) {

drop_attr_stack(&check_vector.checks[i]->stack);

}

vector_unlock();

}

struct attr_check *attr_check_alloc(void)

{

struct attr_check *c = xcalloc(1, sizeof(struct attr_check));

/* save pointer to the check struct */

check_vector_add(c);

return c;

}

struct attr_check *attr_check_initl(const char *one, ...)

{

struct attr_check *check;

int cnt;

va_list params;

const char *param;

va_start(params, one);

for (cnt = 1; (param = va_arg(params, const char *)) != NULL; cnt++)

;

va_end(params);

check = attr_check_alloc();

check->nr = cnt;

check->alloc = cnt;

check->items = xcalloc(cnt, sizeof(struct attr_check_item));

check->items[0].attr = git_attr(one);

va_start(params, one);

for (cnt = 1; cnt < check->nr; cnt++) {

const struct git_attr *attr;

param = va_arg(params, const char *);

if (!param)

BUG("counted %d != ended at %d",

check->nr, cnt);

attr = git_attr(param);

if (!attr)

BUG("%s: not a valid attribute name", param);

check->items[cnt].attr = attr;

}

va_end(params);

return check;

}

struct attr_check *attr_check_dup(const struct attr_check *check)

{

struct attr_check *ret;

if (!check)

return NULL;

ret = attr_check_alloc();

ret->nr = check->nr;

ret->alloc = check->alloc;

ALLOC_ARRAY(ret->items, ret->nr);

COPY_ARRAY(ret->items, check->items, ret->nr);

return ret;

}

struct attr_check_item *attr_check_append(struct attr_check *check,

const struct git_attr *attr)

{

struct attr_check_item *item;

ALLOC_GROW(check->items, check->nr + 1, check->alloc);

item = &check->items[check->nr++];

item->attr = attr;

return item;

}

void attr_check_reset(struct attr_check *check)

{

check->nr = 0;

}

void attr_check_clear(struct attr_check *check)

{

FREE_AND_NULL(check->items);

check->alloc = 0;

check->nr = 0;

FREE_AND_NULL(check->all_attrs);

check->all_attrs_nr = 0;

drop_attr_stack(&check->stack);

}

void attr_check_free(struct attr_check *check)

{

if (check) {

/* Remove check from the check vector */

check_vector_remove(check);

attr_check_clear(check);

free(check);

}

}

static const char *builtin_attr[] = {

"[attr]binary -diff -merge -text",

NULL,

};

static void handle_attr_line(struct attr_stack *res,

const char *line,

const char *src,

int lineno,

int macro_ok)

{

struct match_attr *a;

a = parse_attr_line(line, src, lineno, macro_ok);

if (!a)

return;

ALLOC_GROW(res->attrs, res->num_matches + 1, res->alloc);

res->attrs[res->num_matches++] = a;

}

static struct attr_stack *read_attr_from_array(const char **list)

{

struct attr_stack *res;

const char *line;

int lineno = 0;

res = xcalloc(1, sizeof(*res));

while ((line = *(list++)) != NULL)

handle_attr_line(res, line, "[builtin]", ++lineno, 1);

return res;

}

/*

* Callers into the attribute system assume there is a single, system-wide

* global state where attributes are read from and when the state is flipped by

* calling git_attr_set_direction(), the stack frames that have been

* constructed need to be discarded so so that subsequent calls into the

* attribute system will lazily read from the right place. Since changing

* direction causes a global paradigm shift, it should not ever be called while

* another thread could potentially be calling into the attribute system.

*/

static enum git_attr_direction direction;

void git_attr_set_direction(enum git_attr_direction new_direction)

{

if (is_bare_repository() && new_direction != GIT_ATTR_INDEX)

BUG("non-INDEX attr direction in a bare repo");

if (new_direction != direction)

drop_all_attr_stacks();

direction = new_direction;

}

static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)

{

FILE *fp = fopen_or_warn(path, "r");

struct attr_stack *res;

char buf[2048];

int lineno = 0;

if (!fp)

return NULL;

res = xcalloc(1, sizeof(*res));

while (fgets(buf, sizeof(buf), fp)) {

char *bufp = buf;

if (!lineno)

skip_utf8_bom(&bufp, strlen(bufp));

handle_attr_line(res, bufp, path, ++lineno, macro_ok);

}

fclose(fp);

return res;

}

static struct attr_stack *read_attr_from_index(const struct index_state *istate,

const char *path,

int macro_ok)

{

struct attr_stack *res;

char *buf, *sp;

int lineno = 0;

if (!istate)

return NULL;

buf = read_blob_data_from_index(istate, path, NULL);

if (!buf)

return NULL;

res = xcalloc(1, sizeof(*res));

for (sp = buf; *sp; ) {

char *ep;

int more;

ep = strchrnul(sp, '\n');

more = (*ep == '\n');

*ep = '\0';

handle_attr_line(res, sp, path, ++lineno, macro_ok);

sp = ep + more;

}

free(buf);

return res;

}

static struct attr_stack *read_attr(const struct index_state *istate,

const char *path, int macro_ok)

{

struct attr_stack *res = NULL;

if (direction == GIT_ATTR_INDEX) {

res = read_attr_from_index(istate, path, macro_ok);

} else if (!is_bare_repository()) {

if (direction == GIT_ATTR_CHECKOUT) {

res = read_attr_from_index(istate, path, macro_ok);

if (!res)

res = read_attr_from_file(path, macro_ok);

} else if (direction == GIT_ATTR_CHECKIN) {

res = read_attr_from_file(path, macro_ok);

if (!res)

/*

* There is no checked out .gitattributes file

* there, but we might have it in the index.

* We allow operation in a sparsely checked out

* work tree, so read from it.

*/

res = read_attr_from_index(istate, path, macro_ok);

}

}

if (!res)

res = xcalloc(1, sizeof(*res));

return res;

}

#if DEBUG_ATTR

static void debug_info(const char *what, struct attr_stack *elem)

{

fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()");

}

static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v)

{

const char *value = v;

if (ATTR_TRUE(value))

value = "set";

else if (ATTR_FALSE(value))

value = "unset";

else if (ATTR_UNSET(value))

value = "unspecified";

fprintf(stderr, "%s: %s => %s (%s)\n",

what, attr->name, (char *) value, match);

}

#define debug_push(a) debug_info("push", (a))

#define debug_pop(a) debug_info("pop", (a))

#else

#define debug_push(a) do { ; } while (0)

#define debug_pop(a) do { ; } while (0)

#define debug_set(a,b,c,d) do { ; } while (0)

#endif /* DEBUG_ATTR */

static const char *git_etc_gitattributes(void)

{

static const char *system_wide;

if (!system_wide)

system_wide = system_path(ETC_GITATTRIBUTES);

return system_wide;

}

static const char *get_home_gitattributes(void)

{

if (!git_attributes_file)

git_attributes_file = xdg_config_home("attributes");

return git_attributes_file;

}

static int git_attr_system(void)

{

return !git_env_bool("GIT_ATTR_NOSYSTEM", 0);

}

static GIT_PATH_FUNC(git_path_info_attributes, INFOATTRIBUTES_FILE)

static void push_stack(struct attr_stack **attr_stack_p,

struct attr_stack *elem, char *origin, size_t originlen)

{

if (elem) {

elem->origin = origin;

if (origin)

elem->originlen = originlen;

elem->prev = *attr_stack_p;

*attr_stack_p = elem;

}

}

static void bootstrap_attr_stack(const struct index_state *istate,

struct attr_stack **stack)

{

struct attr_stack *e;

if (*stack)

return;

/* builtin frame */

e = read_attr_from_array(builtin_attr);

push_stack(stack, e, NULL, 0);

/* system-wide frame */

if (git_attr_system()) {

e = read_attr_from_file(git_etc_gitattributes(), 1);

push_stack(stack, e, NULL, 0);

}

/* home directory */

if (get_home_gitattributes()) {

e = read_attr_from_file(get_home_gitattributes(), 1);

push_stack(stack, e, NULL, 0);

}

/* root directory */

e = read_attr(istate, GITATTRIBUTES_FILE, 1);

push_stack(stack, e, xstrdup(""), 0);

/* info frame */

if (startup_info->have_repository)

e = read_attr_from_file(git_path_info_attributes(), 1);

else

e = NULL;

if (!e)

e = xcalloc(1, sizeof(struct attr_stack));

push_stack(stack, e, NULL, 0);

}

static void prepare_attr_stack(const struct index_state *istate,

const char *path, int dirlen,

struct attr_stack **stack)

{

struct attr_stack *info;

struct strbuf pathbuf = STRBUF_INIT;

/*

* At the bottom of the attribute stack is the built-in

* set of attribute definitions, followed by the contents

* of $(prefix)/etc/gitattributes and a file specified by

* core.attributesfile. Then, contents from

* .gitattributes files from directories closer to the

* root to the ones in deeper directories are pushed

* to the stack. Finally, at the very top of the stack

* we always keep the contents of $GIT_DIR/info/attributes.

*

* When checking, we use entries from near the top of the

* stack, preferring $GIT_DIR/info/attributes, then

* .gitattributes in deeper directories to shallower ones,

* and finally use the built-in set as the default.

*/

bootstrap_attr_stack(istate, stack);

/*

* Pop the "info" one that is always at the top of the stack.

*/

info = *stack;

*stack = info->prev;

/*

* Pop the ones from directories that are not the prefix of

* the path we are checking. Break out of the loop when we see

* the root one (whose origin is an empty string "") or the builtin

* one (whose origin is NULL) without popping it.

*/

while ((*stack)->origin) {

int namelen = (*stack)->originlen;

struct attr_stack *elem;

elem = *stack;

if (namelen <= dirlen &&

!strncmp(elem->origin, path, namelen) &&

(!namelen || path[namelen] == '/'))

break;

debug_pop(elem);

*stack = elem->prev;

attr_stack_free(elem);

}

/*

* bootstrap_attr_stack() should have added, and the

* above loop should have stopped before popping, the

* root element whose attr_stack->origin is set to an

* empty string.

*/

assert((*stack)->origin);

strbuf_addstr(&pathbuf, (*stack)->origin);

/* Build up to the directory 'path' is in */

while (pathbuf.len < dirlen) {

size_t len = pathbuf.len;

struct attr_stack *next;

char *origin;

/* Skip path-separator */

if (len < dirlen && is_dir_sep(path[len]))

len++;

/* Find the end of the next component */

while (len < dirlen && !is_dir_sep(path[len]))

len++;

if (pathbuf.len > 0)

strbuf_addch(&pathbuf, '/');

strbuf_add(&pathbuf, path + pathbuf.len, (len - pathbuf.len));

strbuf_addf(&pathbuf, "/%s", GITATTRIBUTES_FILE);

next = read_attr(istate, pathbuf.buf, 0);

/* reset the pathbuf to not include "/.gitattributes" */

strbuf_setlen(&pathbuf, len);

origin = xstrdup(pathbuf.buf);

push_stack(stack, next, origin, len);

}

/*

* Finally push the "info" one at the top of the stack.

*/

push_stack(stack, info, NULL, 0);

strbuf_release(&pathbuf);

}

static int path_matches(const char *pathname, int pathlen,

int basename_offset,

const struct pattern *pat,

const char *base, int baselen)

{

const char *pattern = pat->pattern;

int prefix = pat->nowildcardlen;

int isdir = (pathlen && pathname[pathlen - 1] == '/');

if ((pat->flags & PATTERN_FLAG_MUSTBEDIR) && !isdir)

return 0;

if (pat->flags & PATTERN_FLAG_NODIR) {

return match_basename(pathname + basename_offset,

pathlen - basename_offset - isdir,